CE 213 WATER QUALITY & POLLUTION

Transcription

1 CE 213 WATER QUALITY & POLLUTION L Module E. Solid Waste Management Need, Objectives, Process Involved, Treatment of MSW, Case Study India Dr. Anubha Goel FB 308, anubha@iitk.ac.in, x 7027 Schedule : LEC: Tu Th 5:00-6:30;

2 What is solid waste Origin, Exclusion, Types Hazardous, MSW Characterization of MSW Need for Waste Management MSW Life Cycle ; Stats on generation ; Reasons for concern Basic principles of Solid Waste Management Municipal Solid Waste Management (MSWM) Strategies, Objectives Process of MSWM Waste transformation and Disposal Waste Management in India Some stats Solid Waste in India Generation, Growth rate, collection Status of MSWM in India - A Review (Handout 11) Initiatives in India, Govt. NGO, Private Content 2

3 What is Solid Waste? Any garbage, refuse or other discarded material, including solid, semi-solid, or contained liquid and gaseous material resulting from industrial, commercial, mining, agricultural operation, and from domestic activities, including sludge from a waste treatment plant, water supply treatment plant, or air pollution control facility. 3

4 Origin of Solid Waste

5 Solid Waste: Exceptions: Solid or dissolved material in domestic sewage, or solid or dissolved materials in irrigation return flows or industrial discharges. - Covered by Water Pollution Laws Solid Material suspended in polluted air. - Covered by Air Pollution Laws In most countries, radio-active wastes are not considered to be solid wastes. - Covered by Atomic Energy Regulation Laws 5

6 Types of Solid Waste 6

7 What is Hazardous Waste? Any solid waste which because of its quantity, concentration or physical, chemical or infectious characteristics: 1. cause, or significantly contribute to, an increase in mortality or an increase in serious irreversible or incapacitating reversible illness, 2. pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported or disposed off. Four Characteristics are Essentially Hazardous in any Solid Waste: 1. Ignitability, e.g., inflammable 2. Corrosivity, e.g., very acidic or alkaline 3. Reactivity, e.g., explosive 4. EP Toxicity, EP stands for Extraction Procedure. It is designed to identify wastes likely to leach hazardous concentrations of particular toxic constituents into groundwater as a result of improper management. 7

8 What is Municipal Solid Waste (MSW) Includes commercial and domestic wastes generated in municipal areas in either solid or semi-solid form or as contained liquid or gases, excluding industrial, agricultural and mining wastes but including non-hazardous biomedical wastes and hazardous bio-medical wastes made non-hazardous after treatment. It is mostly non-hazardous, but may contain some hazardous substances used in domestic and commercial activities, Examples: - Oil-based paint, partially empty oil cans, pesticides, waste oil, cleaners, acids/bases, batteries 8

9 Characterization of MSW MSW (Commercial + Domestic) is heterogeneous in nature. MSW can further be sub-divided into the following categories: (% of total MSW) Standard MSW: Residential and commercial wastes excluding special items, hazardous wastes and some others (~65 percent by weight) Bulky items (Furniture, mattress, consumer electronics, white goods, yard waste collected separately, and tires) (~ 5 percent by weight) Hazardous wastes (Oil-based paint, solvents, pesticides, cleaners, acids/bases, petroleum products, oils, batteries) (~0.1 percent by weight) Construction and demolition wastes (~14 percent by weight) Municipal services waste(street sweeping, tree and landscaping, etc.) (~10 percent by weight) Water/wastewater treatment plant sludge (~6 percent by weight) 9

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11 Solid Waste in India 11

12 Rate of Generation It is estimated that about 62 million tonnes of waste is generated annually in the country, out of which 5.6 million is plastic waste, 0.17 million is biomedical waste. In addition, hazardous waste generation is 7.90 million TPA and 15 lakh tonne is e-waste. The per capita waste generation in Indian cities range from 200 grams to 600 grams per day (2011). 43 million TPA is collected, 11.9 million is treated and 31 million is dumped in landfill sites. 12

13 Source: CPCB 13

14 Municipal Solid Waste Generation in Metro Cities / State Capitals 14

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16 Data source: ENVIS Centre on Renewable Energy and Environment Hosted by The Energy and Resources Institute,Delhi Sponsored by Ministry of Environment, Forests & Climate Change, Govt of India The Environmental Information System (ENVIS) network was established as a plan programme under the Ministry of Environment,Forest and Climate change (MoEFCC), Government of India, in December A large number of nodes, coined as ENVIS Centres, have been established in the network to cover the broad subject area of the environment with a focal point in the MoEF. 16

17 TERI Projections on Municipal Solid Waste Generation In India 17

18 Growth of Solid Waste In India Waste is growing by leaps & bounds. In , population of Mumbai increased from 8.2 million to 12.3 million. During the same period, municipal solid waste has grown from 3200 tonnes to 5355 tonnes, an increase of 67%. Waste collection is very low for all Indian cities. City like Bangalore produces 2000 tonnes of waste per annum, the ever increasing waste has put pressure on hygienic condition of the city. Source: The Energy & Resources Institute TERI, New Delhi 18

19 Solid waste MISMANAGEMENT Certain cases in recent years and resulting impacts Cloudburst in Mumbai (2005) clogged the sewage line due to large no. of plastic bags Blast in the Bhusan Steel factory at Noida, caused due to imported scrap from Iran Reduction in the number of migratory birds due to consumption of contaminated foods Stray animals dying on streets and farmland due to consumption of plastic bags, which blocks the food movement in their stomach 19

20 More than 45 million tonnes, or 3 million trucks worth, of garbage is untreated and disposed of by municipal authorities everyday in an unhygienic manner leading to health issues and environmental degradation. (December 2014) Handout 14 3 Million truckloads daily_india's real trash problem_dec

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22 Reasons highlighting need for Waste Management Sharp increase in waste generation Collection, treatment, and proper disposal of only a Limited amount of waste generated Increase in land area requirement for disposal Dumping waste in open generates health impacts According to World Health Organization 22 types of diseases can be prevented or controlled by improving solid waste management in India. Only about 75-80% of the municipal waste gets collected and out of this only % is processed and treated and remaining is disposed of indiscriminately at dump yards. It is projected that by the year 2031 the MSW generation shall increase to 165 million tonnes and to 436 million tons by If cities continue to dump the waste at present rate without treatment, it will need 1240 hectares of land per year and with projected generation of 165 million tons of waste by 2031, the requirement of setting up of land fil for 20 years of 10 meters height will require 66,000 hectares of land. 22

23 Proper solid waste management Scientific disposal of solid waste through segregation, collection and treatment and disposal in an environmentally sound manner minimizes the adverse impact on the environment. Waste-to-energy conversion: As per information available for , compiled by CPCB, municipal authorities have so far only set up 553 compost & vermicompost plants, 56 bio-methanation plants, 22 RDF plants and 13 Waste to Energy (W to E) plants in the country. The amount of waste that is generated, if collected and treated well, can be effectively used to generate energy. Globally, there are 2,200 waste-to-energy plants, of which European Union has 445, China has 150 and USA has 86 compared to just 8 in India. 23

24 Solid Waste Management History of Waste Basic Principles of SWM (Mantra) SWM Process description 24

25 History of Waste A century ago urban squalor and disease led citizen reformers to demand cities take action. They did. Cities became responsible for disposing of waste. But urban refuse was different then. It was mostly coal ash and food scraps, with a small proportion (7%) of simple manufactured products like paper and glass. Today, products and packaging comprise 71% of our waste, much of it designed to be thrown away after a single use or containing toxic components. Garbage has changed, but our waste management system has not changed at the same rate. Source: Upstream:

26 History of Waste contd. Handout 17: History of Waste Summary: The Beginning: Urbanization & Public Health Citizen Groups Demand Collection Services Composition of garbage changes New products create crisis Public Collection for Recycling Emerges Enabling the Throw-away Society Change in nature of waste generated in USA

27 Today s scenario Basic Principles of Solid Waste Management Basic Principles/ 4 Rs Refuse: Do not buy anything which we do not really need. Reduce - Reduce the amount of garbage generated. Alter our lifestyle so that minimum garbage is generated. Reuse - Reuse everything to its maximum after properly cleaning it. Make secondary use of different articles. Recycle Keep things which can be recycled to be given to rag pickers or waste pickers (Kabadiwallahs).Convert the recyclable garbage into manures or other useful products. 27

28 Ideal SWM at a glance Handout 14:Waste Management Initiative in India for human well being. Agrawal et. Al 2015 European Scientific Journal June 2015 /SPECIAL/ edition ISSN: (Print) e - ISSN

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30 MSW Collection, Transport and Treatment